Running rough and rich at idle

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95slowhoe

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Well i finally replaced the tps, and disconnected the battery. At first it ran better. But when i git back from a 40mile trip it started acting up again. No codes yet. But it still misfires and tries to die. Could maybe the coil be going bad or is bad?
 

oldsalt

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Did you also replace the IAC? It's happening at idle right? Is it really missing or just running rough?
 
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95slowhoe

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At idle it misses and runs rough. But going down the road it runs fine.
 
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95slowhoe

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Well I just went and bought a new iac. Ill let you guys know what happens.
 

SunlitComet

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Don't forget to reset.


INSTALL OR CONNECT

1. IAC valve into throttle body as follows:

o Thread-mounted valve - Install with new gasket.
o Flange-mounted valve - Install with new lubricated 0-ring, using attaching screw assemblies. Tighten Thread-mounted IAC valve assembly to 18.0 Nm (13.0 lb. ft.) with 32 mm (1-1/4") wrench. Tighten Flange-mounted attaching screw assemblies to 3.2 Nm (28.0 lb. in.) .

2. Electrical connector to IAC valve.
3. Reset IAC valve pintle position:

o Remove battery cable for 10 seconds.
o Ignition "ON," engine "OFF" for 5 seconds.
o Ignition "OFF," for 10 seconds.
 
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95slowhoe

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Well I got the new iac in, and reset it. But it still misfires a runs rough. This truck is driving me crazy. To me it seems like it has gotten worse. So now im leading toward a bad coil or ignition module.
 

SunlitComet

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POS forum programming. cut and paste will have to work on renaming files.
--http://www.sunlitcomet.com/pdf/automotive/tahoe/92-95/1995%20Chevy%20Tahoe%20Ignition%20Coil%20Testing.pdf--

:emotions122::emotions122::wtf2:

There is a space in "pdf" which when I create it does not show when typing message. I can't get rid off so just do it manually. Sorry.
 
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